In an office 30% of the employes are nummarried , 20% of these employees are post-graduates. The number of married employees in the office who are post-graduates is `3.(1)/(2)` times that of the unmarried employees who are post-graduates. What percentage of the married employees are post-graduates?
A. `30%`
B. `32%`
C. `30%`
D. `27%`